Lindtneria asiae-orientalis S.L. Liu & S.H. He, 2016

Liu, Shi-Liang, Wu, Fang & He, Shuang-Hui, 2016, Lindtneria asiae-orientalis sp. nov. (Stephanosporaceae, Basidiomycota) from China based on morphological and molecular characters, Phytotaxa 260 (3), pp. 283-290 : 286-288

Lindtneria asiae-orientalis S.L. Liu & S.H. He , sp. nov. ( Figs. 2–4 )

MycoBank no.: MB 815564

Diagnosis —The species is distinct by buff-yellow to orange-yellow poroid hymenophores, septate generative hyphae with or without clamps, and relatively small ellipsoid to broadly ellipsoid basidiospores.

Type — CHINA. Heilongjiang Prov.: Sunwu County, Xunbielahe Nat. Res., on rotten wood of Populus , 24 August 2014, Dai 13999 (BJFC017701, holotype!).

Etymology— asiae-orientalis (Lat.) : referring to the locality in East Asia.

Fruiting body annual, resupinate, effused, soft, easily separated from the substrate, without odor or taste when fresh, membranaceous and brittle when dry, up to 10 cm long, 5 cm wide and 1.2 mm thick at the center. Hymenophore poroid with irregular pores, pore surface buff-yellow to orange-yellow when fresh, becoming pinkish buff to cinnamon-buff upon drying; margin thinning out, cream; pores about 1 per mm; dissepiments thin, distinctly lacerate. Subiculum cream, thin, up to 0.2 mm thick; tubes concolorous with pore surface, soft, membranaceous and brittle, up to 1 mm long.

Hyphal system monomitic; generative hyphae septate with or without clamps. Generative hyphae in subiculum hyaline to yellowish, thin- to slightly thick-walled, frequently branched, loosely interwoven, sometimes inflated, slightly constricted at septa, 2.5–9 μm in diam. Generative hyphae in tubes hyaline, thin-walled, moderately branched, interwoven, 2.5–7 μm in diam., sometimes up to 10 μm at inflated part. Cystidia and cystidioles absent. Basidia clavate, with four sterigmata and a basal clamp connection, sometimes non-clamped, with cyanophilous globules, 23–36 × 8–10.5 μm; basidioles in shape similar to basidia, but slightly smaller. Basidiospores ellipsoid to broadly ellipsoid, hyaline to yellowish, distinctly thick-walled, echinulate, with irregularly arranged conical spines up to 1 μm, some bearing a guttule, tapering at one side, IKI–, CB+, (5.6–)5.8–7(–7.5) × (4.2–)4.7–5.2(–5.5) μm, L = 6.5 μm, W = 5 μm, Q = 1.3 (n = 60/2).

Additional specimen examined— CHINA. Heilongjiang Prov.: Sunwu County, Xunbielahe Nat. Res., on rotten wood of Populus , 24 August 2014, Dai 14000 (BJFC017703, paratype!).

Figures

FIGURE 2. Basidiocarps of Lindtneria asiae-orientalis (BJFC017701, holotype). Photo courtesy: Yu-Cheng Dai.

FIGURE 3. Microscopic structures of Lindtneria asiae-orientalis (BJFC017701, holotype). a. Basidiospores. b. A section from tube. c. Hyphae from subiculum. Scale bars: a–c = 10 μm. Line drawings by Shi-Liang Liu.

FIGURE 4. Scanning electron micrographs of basidiospores of Lindtneria asiae-orientalis (BJFC017701, holotype). a. Depicting variability in spore ornamentation. b. A basidiospore on sterigmatum. c, d. Mature basidiospores depicting corona (c), plage (p), hilar appendix (hx), hilum (hi).